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Type: Artigo de periódico
Title: Calibration Of Paint And Varnish Properties: Potentialities Using X-ray Spectroscopy And Partial Least Squares
Author: Pereira F.M.V.
Bueno M.I.M.S.
Abstract: This work presents a method for multivariate calibration of the properties of varnishes and paints, combining X-ray Spectroscopy (XRS) with Partial Least Squares (PLS) data treatment. The potential calibrated property for varnishes was density (calibrated values raging from 0.88 to 0.92 g cm- 3 and absolute errors from 0.0014 to 0.055 g cm- 3). For paints, the potential calibrated property was Stormer viscosity (calibrated values ranging from 72 to 89 KU and absolute errors from 0.4 to 8 KU). The information here presented was also promoted by the influence of Compton and Rayleigh effects observed in X-ray spectra. X-ray fluorescence spectra were obtained using an ED- XRF system equipped with a Rh target X-ray tube. The importance of the X-ray scattering region (from 18.00 to 24.00 keV), where Compton and Rayleigh effects occur, were evidenced by the best PLS models and lower error values. With the PLS method and X-ray spectra it was also possible to calibrate the content % (m/m) of two organic elements, C and H. It is important to highlight that the proposed analytical method permitted to save time in the quality control of the studied samples, reducing the generation of residues. © 2008 Elsevier B.V. All rights reserved.
Rights: fechado
Identifier DOI: 10.1016/j.chemolab.2008.02.003
Date Issue: 2008
Appears in Collections:Unicamp - Artigos e Outros Documentos

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